Michael Andretti done with Indy 500

Andretti finished 13th in Sunday's race, which was won by fellow Andretti Green Racing driver Dario Franchitti.

It was Andretti's second Indy 500 after a two-year hiatus in which he didn't race. This time, he indicated he's done for good.

"Right now I have no thought of coming back," Andretti said on Monday during a photo session at Indianapolis Motor Speedway for Franchitti and other team members.

"I would be very surprised if my feelings changed. I'm glad I did it - it was all good - but I was going crazy this month."

Andretti said his responsibilities as co-owner of Andretti Green Racing began to interfere with the driving, and vice versa.

"I just felt like there were a lot of things I needed to be doing for the team that I wasn't able to," he said. "It distracts you. It's just too stressful and too much."

Andretti leaves Indy with a frustrating distinction - the driver who's led the most laps (431) without winning the race. He competed in 16 Indy 500s, with a top finish of second in 1991, but led the race nine times.

Last year, Andretti finished third behind winner Sam Hornish Jr and runner-up Marco Andretti, Michael's son. Andretti said he didn't feel torn between the driver and owner roles last year the way he did this year.

"I was really focused with Marco (being a rookie) last year," Andretti said. "I went in there to try to help him. It was a little different.

"Also, I've become a lot more involved with the team than I ever have. I really felt I needed to do that last year because we weren't getting it done. I felt like I needed to be there pushing."

Andretti, 44, competed in CART, Formula One and the IndyCar Series, winning 42 CART races and the series championship in 1991.

AGR, which he co-owns with Kim Green and Kevin Savoree, features drivers Danica Patrick, Marco Andretti, Tony Kanaan and Franchitti.

Franchitti's win was the team's second in the past three years at Indianapolis. Dan Wheldon won the race in 2005. The team also won IndyCar Series championships in 2004 with Kanaan and 2005 with Wheldon.